Pain. Suffering, even.

D&D 5e Houserules; Adding more weapon types to pick from; No playing uncommon or exotic races; Letting people use Dex for things that Strength is for; Requiring the party comp to be "balanced"; 3.5e style armor rules; No feats; "3d6 ability scores..."; "...straight down."; Player's Handbook only; Battlemaster is banned for some reason